1 // RUN: %clangxx_cfi_dso -DSHARED_LIB %s -fPIC -shared -o %t1-so.so 2 // RUN: %clangxx_cfi_dso %s -o %t1 %t1-so.so 3 // RUN: %expect_crash %t1 2>&1 | FileCheck --check-prefix=CFI %s 4 // RUN: %expect_crash %t1 x 2>&1 | FileCheck --check-prefix=CFI-CAST %s 5 6 // RUN: %clangxx_cfi_dso -DB32 -DSHARED_LIB %s -fPIC -shared -o %t2-so.so 7 // RUN: %clangxx_cfi_dso -DB32 %s -o %t2 %t2-so.so 8 // RUN: %expect_crash %t2 2>&1 | FileCheck --check-prefix=CFI %s 9 // RUN: %expect_crash %t2 x 2>&1 | FileCheck --check-prefix=CFI-CAST %s 10 11 // RUN: %clangxx_cfi_dso -DB64 -DSHARED_LIB %s -fPIC -shared -o %t3-so.so 12 // RUN: %clangxx_cfi_dso -DB64 %s -o %t3 %t3-so.so 13 // RUN: %expect_crash %t3 2>&1 | FileCheck --check-prefix=CFI %s 14 // RUN: %expect_crash %t3 x 2>&1 | FileCheck --check-prefix=CFI-CAST %s 15 16 // RUN: %clangxx_cfi_dso -DBM -DSHARED_LIB %s -fPIC -shared -o %t4-so.so 17 // RUN: %clangxx_cfi_dso -DBM %s -o %t4 %t4-so.so 18 // RUN: %expect_crash %t4 2>&1 | FileCheck --check-prefix=CFI %s 19 // RUN: %expect_crash %t4 x 2>&1 | FileCheck --check-prefix=CFI-CAST %s 20 21 // RUN: %clangxx -DBM -DSHARED_LIB %s -fPIC -shared -o %t5-so.so 22 // RUN: %clangxx -DBM %s -o %t5 %t5-so.so 23 // RUN: %t5 2>&1 | FileCheck --check-prefix=NCFI %s 24 // RUN: %t5 x 2>&1 | FileCheck --check-prefix=NCFI %s 25 26 // RUN: %clangxx -DBM -DSHARED_LIB %s -fPIC -shared -o %t6-so.so 27 // RUN: %clangxx_cfi_dso -DBM %s -o %t6 %t6-so.so 28 // RUN: %t6 2>&1 | FileCheck --check-prefix=NCFI %s 29 // RUN: %t6 x 2>&1 | FileCheck --check-prefix=NCFI %s 30 31 // RUN: %clangxx_cfi_dso_diag -DSHARED_LIB %s -fPIC -shared -o %t7-so.so 32 // RUN: %clangxx_cfi_dso_diag %s -o %t7 %t7-so.so 33 // RUN: %t7 2>&1 | FileCheck --check-prefix=CFI-DIAG-CALL %s 34 // RUN: %t7 x 2>&1 | FileCheck --check-prefix=CFI-DIAG-CALL --check-prefix=CFI-DIAG-CAST %s 35 36 // Tests that the CFI mechanism crashes the program when making a virtual call 37 // to an object of the wrong class but with a compatible vtable, by casting a 38 // pointer to such an object and attempting to make a call through it. 39 40 // REQUIRES: cxxabi 41 42 #include <stdio.h> 43 #include <string.h> 44 45 struct A { 46 virtual void f(); 47 }; 48 49 void *create_B(); 50 51 #ifdef SHARED_LIB 52 53 #include "../utils.h" 54 struct B { 55 virtual void f(); 56 }; 57 void B::f() {} 58 59 void *create_B() { 60 create_derivers<B>(); 61 return (void *)(new B()); 62 } 63 64 #else 65 66 void A::f() {} 67 68 int main(int argc, char *argv[]) { 69 void *p = create_B(); 70 A *a; 71 72 // CFI: =0= 73 // CFI-CAST: =0= 74 // NCFI: =0= 75 fprintf(stderr, "=0=\n"); 76 77 if (argc > 1 && argv[1][0] == 'x') { 78 // Test cast. BOOM. 79 // CFI-DIAG-CAST: runtime error: control flow integrity check for type 'A' failed during cast to unrelated type 80 // CFI-DIAG-CAST-NEXT: note: vtable is of type '{{(struct )?}}B' 81 a = (A*)p; 82 } else { 83 // Invisible to CFI. Test virtual call later. 84 memcpy(&a, &p, sizeof(a)); 85 } 86 87 // CFI: =1= 88 // CFI-CAST-NOT: =1= 89 // NCFI: =1= 90 fprintf(stderr, "=1=\n"); 91 92 // CFI-DIAG-CALL: runtime error: control flow integrity check for type 'A' failed during virtual call 93 // CFI-DIAG-CALL-NEXT: note: vtable is of type '{{(struct )?}}B' 94 a->f(); // UB here 95 96 // CFI-NOT: =2= 97 // CFI-CAST-NOT: =2= 98 // NCFI: =2= 99 fprintf(stderr, "=2=\n"); 100 } 101 #endif 102
